Cassie Ventura was Diddy’s first accuser and has not only triggered his downfall but will now take the stand in his sex trafficking trial.

Diddy's ex-girlfriend Cassie Ventura will testify under her real name at the hip-hop mogul's looming sex trafficking and racketeering trial.

The longtime girlfriend of the incarcerated rap mogul will no longer be known as "Victim 1" when she takes that stand at his sex trafficking and racketeering trial in New York next month.